8 entries under youthful topic. ×

14
childish(adjective, new, inexperienced, infant, young)
13
juvenile(adjective, young, childish)
13
young(adjective, young, immature, like a boy)
12
puerile(adjective, infant, young, like a boy)
11
adolescent(adjective, young, immature, preadult)
10
boylike
10
immature(adjective, young)
2
innocent
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APASmart Define. (2015). boyish thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/boyish/thesaurus/synonyms
ChicagoSmart Define. 2015. "boyish thesaurus" https://smartdefine.org/boyish/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, boyish thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/boyish/thesaurus/synonyms>.
MLASmart Define. "boyish thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/boyish/thesaurus/synonyms>